Influence of the Inclusion of Propylene Carbonate Electrolyte Solvent on the Microstructure and Thermal and Mechanical Stability of Poly(l-lactic acid) and Poly(vinylidene fluoride-co-hexafluoropropylene) Battery Separator Membranes,The Journal of Physical Chemistry C

当前位置： X-MOL 学术 › J. Phys. Chem. C › 论文详情

Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)

Influence of the Inclusion of Propylene Carbonate Electrolyte Solvent on the Microstructure and Thermal and Mechanical Stability of Poly(l-lactic acid) and Poly(vinylidene fluoride-co-hexafluoropropylene) Battery Separator Membranes
The Journal of Physical Chemistry C ( IF 3.3 ) Pub Date : 2023-05-31 , DOI: 10.1021/acs.jpcc.3c02514
Luis Amaro Martins ₁ , Laura Teruel Biosca ₁ , José Antonio Gómez-Tejedor _{1,

2} , J P Serra _{3,

4} , Daniela M Correia ₅ , Carlos M Costa _{3,

4} , Senentxu Lanceros-Méndez _{6,

7} , José Luis Gómez Ribelles _{1,

2} , Isabel Tort-Ausina _{1,

2}

Affiliation

The influence of the inclusion of the organic solvent propylene carbonate (PC) in microporous membranes based on poly(l-lactic acid) (PLLA) and poly(vinylidene fluoride-co-hexafluoropropylene) P(VDF-HFP) has been studied based on its relevance for the application of those separator membranes in lithium-ion batteries. The membranes have been produced through solvent casting and characterized with respect to the swelling ratio originated by the uptake of the organic solvent. The organic solvent uptake affects the porous microstructure and crystalline phase of both membrane types. The organic solvent uptake amount affects the crystal size of the membranes as a consequence of the interaction between the solvent and the polymer, since the presence of the solvent modifies the melting process of the polymer crystals due to a freezing temperature depression effect. It is also shown that the organic solvent partially penetrates into the amorphous phase of the polymer, leading to a mechanical plasticizing effect. Thus, the interaction between the organic solvent and the porous membrane is essential to properly tailor membrane properties, which in turn will affect lithium-ion battery performance.

中文翻译：

碳酸亚丙酯电解质溶剂的加入对聚（l-乳酸）和聚（偏二氟乙烯-共-六氟丙烯）电池隔膜的微观结构和热力学稳定性的影响

基于聚（ L-乳酸）（PLLA）和聚（偏二氟乙烯）的微孔膜中包含有机溶剂碳酸亚丙酯（ PC）的影响-六氟丙烯) P(VDF-HFP) 基于其与这些隔膜在锂离子电池中应用的相关性进行了研究。这些膜是通过溶剂浇铸生产的，并根据吸收有机溶剂产生的溶胀比进行了表征。有机溶剂的吸收影响两种膜类型的多孔微观结构和晶相。由于溶剂和聚合物之间的相互作用，有机溶剂的吸收量会影响膜的晶体尺寸，因为溶剂的存在会由于凝固温度降低效应而改变聚合物晶体的熔化过程。还表明，有机溶剂部分渗透到聚合物的无定形相中，导致机械塑化作用。因此，

更新日期：2023-05-31

点击分享查看原文

点击收藏

公开下载

阅读更多本刊新发论文本刊介绍/投稿指南